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System randomly resetting

Last response: in Motherboards
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November 29, 2004 11:36:37 AM

Hi everyone.

I'm having a devil of a time with my system and I'm hoping to find some advice here.

Some stats:

MOBO: GA-7N400-L
CPU: AMD Sempra 2500+
RAM: enough
Power Supply: 410 Watts
OS: Win2K SP4 (whatever the latest SP is)

I built my system over the weekend, and my system is now randomly resetting on me!

I've tried re-formatting the hard drive, scanning with the latest virus defs and adaware version, upgrading my BIOS to the latest, putting in a new power supply and even resetting my CMOS.

Still nada...my system runs for a while then decides to reset itself..sometimes it doesn't even finish loading the startup services before rebooting, sometimes it happens after an hour.

Can anybody suggest what to look for? How do I tell if I should return my mobo? (ie. IS this a mobo problem?)

thanks, and sorry for sounding vague, this has set me back...my year end was last month and this kind of headache while doing my books I DON'T need..:) 
a c 435 V Motherboard
a b ) Power supply
November 29, 2004 6:09:07 PM

I would run memtest, and also check your system temps in the bios hardware monitor for gradual changes. MBM version 5.370 will list the temps for the cpu and mobo in the lower right area of your screen.
November 29, 2004 10:02:04 PM

ya, check system temps. intel does a good job throttling down when they get hot, but amd isn't too good with that. they may be getting better, but i believe it was around the 2500 generation that THG used in an overheating experiment when it just exploded from heat. intels will just slow down to a halt, amds shut down altogether.

ASUS P5P800
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PNY FX5200 128MB/256bit
WD 74GB Raptor
2x256MB PC3200 2-2-2-5
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December 1, 2004 5:17:45 PM

check your power supply, if you got one of those $30 case w/ psu, then the psu is very bad. if the 3.3v line of the psu is bad then it will reset the computer and mess up the clock generator.
January 22, 2005 1:33:12 AM

I've similar problem with random resettings, right after a BSOD. (Sometimes it just BSOD without resetting.) This happens when I upgraded from 512M RAM (256M x 2) to 1G RAM (256 x 4) - all running at DDR400. I have tried trouble shooting with power supply, reformat/reinstall WinXP, re-arrange memory in different slot, etc.,and problem still exist.

Then I found this FAQ within Gigabyte site regarding memory issue:

"Q: My motherboard provides four DIMM slot for expansion. But, when I install 4xDDR400 memory modules on this MB, while BIOS POST, the board only recognizes my memory mdoules as DDR266. Please fix the problem with new version BIOS.
A: Based on nVIDIA chipset specification, the motherboard you have only support 3 DIMM slots officially. When a MB comes with GIGABYTE unique memory H/W deisgn, the board you have can provide the extra DIMM slot and make users get better flexibility on H/W installation/expansion. But, because the quality of memory modules in retail market is uneven, thus, when you install 4xDDR400 memory modules on the motherboard, our MB BIOS will decrease memory speed to make sure most system will bootup properly."

So I guess try down the memory speed a bit to see if that helps. I'm going to try that tonight...
!